Fake Lizard

Find a fake lizard, mouse, snake, cockroach, etc. (probably made of rubber). Say you're going to the bathroom and bring it with you. Come back a minute later with it in your hand and say "Look who I found wandering around. Isn't he cute?" Then have mud in your hand behind it and say that it pooped and ask if any one wants it. ...or, if you have chocolate use that and eat if everyone refuses. Classic gross out trick.

Sneezing powder

by Joe Byles
(sevenoaks)

Make sneezing powder out of the most irritating spices (black pepper, cumin, chilli powder) and put them in your teacher's/friend's/foe's book. When they turn the page of it, it chucks the powder on his or her nose.

Cookie Lovers Prank

by Sami Nadine
(America)

Make someone who eats a lot of cookies a batch of cookies. Put everything it needs in it but also add a wealthy amount of hot sauce, chilli-pepper powder, or anything spicy in the cookies that will make them taste spicy and bad. ..Or if you want to do it to just one person, do it to one cookie and keep track of it. Eat a cookie yourself in front of them so they don't get suspicious.

Cup prank

For this cool prank, get:

Styrofoam cup with a lid

Straw

Poke a hole in center of the cup, in the bottom of it. Stick the straw in the hole. Now put oil around the hole. Get their favorite drink and put it in the cup and give it to them. They will lift the straw up, then their drink will leak out of the hole. Laugh out loud!Or get one of those 'Dribble Glasses' that make peoples drinks dribble all down the front of them!